#RTX 3080 Limited Utilization when Rendering?

85 messages · Page 1 of 1 (latest)

ionic palm
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Hi there, I will keep it short. I have a Ryzen 9 5900X CPU and a RTX 3080. I record in 240 fps, but I like to interpolate my videos from 1440 3840-7680 fps. Don't ask me why. My CPU is getting hogged around 70-99% usage and my GPU is hardly being used at all for rendering so it is quite a slow process. Is there a reason for this? I set my GPU settings on blur to true and set it specially as either NVIDIA or nvidia in the config settings. I want my GPU to be utilized but can't seem to figure out what is going on. I don't want my interpolation stuff changed via framerate, but is there a way to utilize the GPU over the CPU for utilization? Thank you!

image.png
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my config file:

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  • blur
    blur: false
    blur amount: 1
    blur output fps: 60
    blur weighting: equal

  • interpolation
    interpolate: true
    interpolated fps: 3840

  • rendering
    quality: 16
    preview: false
    detailed filenames: true

  • timescale
    input timescale: 1
    output timescale: 1
    adjust timescaled audio pitch: false

  • filters
    brightness: 1
    saturation: 1
    contrast: 1

  • advanced rendering
    gpu: true
    gpu type (nvidia/amd/intel): NVIDIA
    deduplicate: true
    custom ffmpeg filters: -c:v libx264 -preset medium -crf 15 -c:a copy

  • advanced blur
    blur weighting gaussian std dev: 2
    blur weighting triangle reverse: false
    blur weighting bound: [0,2]

  • advanced interpolation
    interpolation program (svp/rife/rife-ncnn): svp
    interpolation speed: medium
    interpolation tuning: weak
    interpolation algorithm: 23

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I also do have the latest NVIDIA drivers for my 3080 as I updated them 2 days ago.

rugged summit
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reduce the interpolation fps to reduce cpu usage

ionic palm
dusty rock
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also make ur custom ffmpeg filter use nvenc not libx

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try -c:v h264_nvenc -preset p7 -qp 18

ionic palm
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Oh?

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What's the difference between libx and h264 nvenc?

rugged summit
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h264 nvenc uses your gpu for encoding

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this will slightly benefit with lowering cpu usage but not drastically

ionic palm
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yeah..that really helped actually:

image.png
ionic palm
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should rife be used for rendering/blurring thousands of interpolated frames? I interpolated my video at 3,840 frames, and now blurring it to 60 fps with 1.0 blur with interpolation disabled

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im using svp but idk if rife would be any faster

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its been rendering for 3 hours so far and its only at 10 seconds out of 9 mins of footage .-.

dusty rock
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its more accurate, it should only be used for low-fps input videos.

ionic palm
ionic palm
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Is there a way I can render the file faster, without losing loads of quality? Since I recorded it in 240 fps, interpolated it in 3,840 frames, then set blur to 1.0 and interpolation to false, then rendered it. It's been well over 3 hours and it has only rendered 51 seconds out of 9 minutes. Is there a way to make it faster while still keeping the 3,840 frames to convert it to 60?

rugged summit
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for better quality

ionic palm
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One more question for you. Can I render multiple small files in blur at the same time?

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Or is that not possible?

ionic palm
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Trying to convert this file into 60 fps with blur but it's not working and gives me an error

Screenshot_20231029-224018.png
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Any ideas why?

dusty rock
ionic palm
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really?

dusty rock
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blur breaks with too many blurframes

ionic palm
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is there a max limit?

dusty rock
ionic palm
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the heck

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so id have to set that to 100?

image.png
dusty rock
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no

ionic palm
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my friend somehow managed to do it with 7680 too?

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or is it cause I set it to this?

image.png
dusty rock
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"blur frames" means amount of blended frames

so interpolation fps / blur fps = blur frames

ionic palm
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oh

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so how do I render the new 7,680 footage then?

dusty rock
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you dont

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just interpolate to a lower frame rate

ionic palm
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cause this is what I am working with

image.png
ionic palm
dusty rock
ionic palm
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shoot

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ok

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so

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can I interpolate the fps first before I actually blur the footage, then once the clips are rendered at 3840/the new interpolated fps, I can enable blur and turn off the interpolation?

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or should I leave interpolation on all the time even after the clips have been interpolated? Not sure how that works and how it should be done properly

dusty rock
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why interpolate and blur seperatly??

ionic palm
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because I was thinking that interpolation would give it "more" frames. then I can blur it with all those extra frames

dusty rock
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yeah thats the point

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but

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you can just enable both

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and render once

ionic palm
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is there a reason to do them together, as I thought doing them one at a time would be better and make it more accurate?

dusty rock
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no

ionic palm
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oh

dusty rock
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that jsut makes it slower

ionic palm
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ah crud ive been doing that this whole time xd

dusty rock
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lol

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anyway i am going to bed so dont expect me to respond for many hours 👍

ionic palm
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all good! thanks for your help!

ionic palm
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Would there be any possible way of getting blur to render it out in 7,680 fps? I know you said there wouldn't be a difference but I also just wanna visually see that for myself too

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It can do 3,840 just fine but I really hope it can go higher than that

rugged summit
ionic palm
rugged summit
dusty rock
ionic palm
rugged summit
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most people even don't exceed 2400 fps

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also you aren't going to get any diminishing returns

ionic palm
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ah

ionic palm
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silly question but how do I install rife in order to be used by blur, and what version of rife that I have in the file is the best version of it?

image.png
rugged summit
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honestly i would recommend using smoothie-rs for rife

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not sure blur's implementation is broken

ionic palm